header{
    overflow: hidden;
    border-radius: 5px;
    box-shadow: 0px 3px #f1f2f3a7;
}
nav{
    width: 98%;
    overflow: hidden;
    margin: 10px auto;
    font-size: 14px;
    position: fixed;
    background-color: #f7f7f7;
    margin-top: -8px;
}
nav ul{
    width: 33%;
    height: 40px;
    line-height: 40px;
    float: left;
    color: black;
}
nav li{
    margin-left: 5px;
    margin-right: 10px;
    float: left;
}
nav li a{
    color: black;
}
.sousuo{
    width: 25%;
    overflow: hidden;
    float: left;
}
.sousuo input{
    width: 90%;
    height: 40px;
    border-radius:5px;
    background-color: #f1f2f3a7;
}
.sousuo img{
    width: 20px;
    margin-left: 5px;
}
.denglu{
    width: 40px;
    height: 40px;
    line-height: 40px;
    float: left;
    border-radius: 50px;
    text-align: center;
    color: white;
    background-color: #00aeec;
}
.nav2{
    width: 25%;
    height: 40px;
    float: left;
    color: black;
}
.nav2 div{
    width: 14%;
    margin-left: 5px;
    text-align: center;
    float: left;
}
.nav2 div:last-child{
    width: 18%;
}
.nav2 img{
    margin: auto;
}
.tougao{
    width: 7%;
    height: 35px;
    line-height: 35px;
    float: left;
    border-radius: 5px;
    background-color: #fb7299;
}
.tougao img{
    margin: 8px 3px 5px 18px;
    float: left;
}
.tougao span{
    float: left;
    color: white;
}
nav img{
    width: 18px;
}
.logo{
    width: 4%;
    margin: 5px;
    float: left;
}
a{
    text-decoration: none;
}
ul{
    list-style-type: none;
}
main{
    width: 85%;
    margin: 0 auto;
}